COVEY, STEPHEN R. <br/><br/>
PRINCIPLE - CENTERED LEADERSHIP 
STEPHEN R. COVEY 
 - LONDON  SIMON & SCHUSTER  c1992 
 - 334p; 
<br/><br/><label>ISBN: </label>9780671711351 
<br/><br/><label>LC Class. No.: </label>HD 57  / .7 COV